Lumoxiti includes a boxed warning advising health care professionals and patients about the risk of developing capillary leak syndrome, a condition in which fluid and proteins leak out of tiny blood vessels.

The warning also notes the risk of hemolytic uremic syndrome, a condition caused by the abnormal destruction of red blood cells.

Hairy cell leukemia is a rare form of blood cancer in which the bone marrow makes too many B cells, a type of white blood cell that fights infection.